You can check to see if your iPhone is unlocked from a carrier using any of a few different methods.

Your mobile phone's IMEI number is an international identification number for mobile phones. This unique number is, in many ...

The International Mobile Equipment Identity (IMEI) number is a unique 15-digit code used to distinguish your device from ...

Here's a hypothetical situation for you: let's say you leave your Android smartphone somewhere in public, or someone snatches it from you. If someone is able to crack your PIN, they could use your ...